Piston-ring expander



Ucit. M A 11,11,761

T. A. HUTSELL PISTON RI NG EXPANDER Filed Sept. 1, 1923 kmtm 7/70/2705 H. hutsefl Patented @ct. id, 1924 THOMAS a. HUTSELL, on SPOKANE, WASHINGTON.-

IPISTON-EING EKPANDER.

' Application filed September To all whom it may concern:

Be it known that l, TlHoMAs A. Bureau,

a citizen of the United States, residing at Spokane, in Spokane County. and State of its is well known the rings for use with pistons for internal combustion engines, which are accurately machined and true before being applied to the piston grooves, are in many instances badly distorted, twisted or sprung during the process of expansion for application to the piston,'with consequent loss of efliciency in the performance of their functions. Afrequent cause for this distortion is due to lack of uniformity and equal distribution of the power applied by an implement employed in expanding the ring. By the utilization of my invention the ring may be expanded with facility and accuracy, slipped over the piston and then released to snap .into position without undue or excessive strains, thus permitting the ring to assume its operative position in its original and normal condition.

The invention consists in certain novel combinations and arrangements of parts involving an implement of the plier type as whereby the ring may be gripped and subsequently expanded by one continuous compression movement of the plier-handles; in which the released handles are separated by a spring; and in which the released jaws are also separated by spring actuated movement, as will be hereinafter more fully described and claimed.

in the accompanying drawings I have illustratcd one complete example of the physical en'il'iodiment of my invention wherein the parts are combined and arranged in accordance with the best mode I have thus far devised for the practical application of the principles of my invention.

Figure 1 is a top plan view of the implement shown in normal position in full lines and applied to a piston ring, and in dotted lines shown in position after expanding the ring.

Figure 2 is an edge view of the implement.

Figure 3 is a detail perspective View of tllO ' ring.

r1923. Serial no. 660,625.

one of a pair of handles of the plier type for spreading orexpanding the ring.

Figure 4.- is a detail view of one of the links between a handle and gripping or relatively movable jaw.

Figure is perspective viewof one o the stationary jaws.

v Figure 6 isa perspective view of one of the relatively movable, pivoted jaws.

The two handles 1 andQ of the plier type are fashioned in suitable shape from metal blanks and provided with angularly disposed, integral arms 3 and 4. The handles are associated and pivoted together as by,

a pin 5, and designed to be compressed or drawn together by hand-grip as indicated in dotted lines Figurel. On the pivotpin 5 and above the two pivoted handles are retained a pair of pivoted arms 6 and 7, each of which is fashioned from a metal blank 4 jaws formed integral with the arms are disposed in a plane at right angles tothat of the arms. The arms are capable of a pivotal movement on the pin 5 in a horizontal plane, but the aws, which of course move with-the arms while the two ends R and R are being separated, do not move in a vertical dlrection in their function of gripping the ring enc is designed to lit up under the outer edge of the ring, but as indicated in Figure l these Each of the jaws has a tooth- 10 which jaws do not extend the full width of the The two aw members are normally held-together by means of a spring 11 located between them with its ends secured in the holes 12 therein, and the jaws arereturned by the spring to normal position, after release, after having spread the ring ends R and R, a stop lug 13 being provided on the arm (5 for co -action with the arm 7 as indicated in. Figure 1 to limit the movement of the jaws under tension of the spring.

Each of the stationary jaws has for co-- action therewith a relatively movable jaw as 14 and 15 and these jaws each has a tooth 16 integral therewith to bear upon the upper outer edge of the ring ends above the complementary teeth 10 of the stationary jaws. These movable jaws have a pivotal movement on the stationary jaws, the former having holes 17 for bearings on the pivot pin or rivet 18, which is secured in the opening 18 of the stationary jaws, and in Figure 7 the relation (if thetieth'lO, and 16 will be apparent. In full lines in this figure the "teeth, are separated, wh ile in dotted lines the tooth 16 is showrrin gripping position force-action with the tooth 10.

'The pivotal movement of thegripping jaws is accomplished through a connection at the ear 19 of a bentlink 2 one otwhich PIQY Qsls QtwQ --m va ;j w: These links are pivoted towthe arms 3 and & crew I plier hand lesgin holes v 21 and through their e eee ientq he'pe fo a e oe 1911 t movable gripping jaws, aetuatesaid jaws when the handlesai'e pressed together. The

' grippingjaws are'held in open position by f coin ecting to the top, perforated ears 22 m thereon the respective springs 28, which 7 Sprin s lsi rie mr l at i i :-otl1e ds b ii rte ratedi, en n lfie f h l n s which ends .v also form the pivot I point for handles,

d i i T i it l bi pp en h tth ii a 25 1 actuatedto grip thering and are yyt ensionof their springs, and that themai ns aregseparatedlaterally tosp-read I 7 turned erin'gY eds y Posit ve-mov d -e s afie ire se: o norma Position y the ' fbreis ateclgthe e h; o h j w engage only; the outer, edges offlthe ring ends, and

t will bwnparent me a r t e g a heen.- 'e; panded, and slipped over, the piston Y the';ring may be permitted to snap into its gTh s positioning otthe teeth preir -conta;ct with thepiston and the vents 1. innei ledges ofthe ring ends are thus free to slipg into; the pistongroove without obtt nn; rom t t o or imp m t Wi h the,iIn-ple nent in fu-ll jline position in Figtlon i v carry;

11re Q 21 il heeh ll 313 Pressed t y hand, and the initial movement of the handles cau'ses, the: pivoted gripping vjaws to grip the, ring ;e1ids;through the link connec- ;;he,continued movement of the hanains'thegrip on the ring ends and at the same tin e," through the link connecdles I tion wvith the gripping, jaws (whichlatter the stationary jaws) the two members connect thenr with the angle 111g; 11, v In gripping the ring endsas of each gripping device are swung laterally and outwardly on the common pivot point 5eforthe arms 6 and 7. When the dotted position of Figure l is reached the ring is slipped over the piston and placed in position for snapping into its groove. Upon releasing the handles 1 and 2 the grip on the ring ends is loosened and the spreading arms 6 and 7 are released thus permitting the expanded ring to contract and snap into its groove. The several springs of thetoolreturn. the operating partsthereof to normal position for future usec Having thus fully described my inventi0nj,.what I claim as new and desire to secure by, Letters Patent is 1. The combination with a pair of pivoted handles having angular-1y disposed integral arms, and a pair of spreader arms pivoted w th, saldhandles, of stat onary jawscan ried by said spreader arms, gripping jaws pivoted on said stationary jaws and laterally mpvalole with the spreader arms, and pivotedflinks connecting said gripping jaws and angularar ns, v v

2.,The combination with apair of handles. having angularly disposed integral arms, "pair of spreader. arms and a "single; pivot for; the handles and spreader,

arms, ofa pair of stationary jaws carried y d prea er rms n a Pr nscwmec 'ing said aws, gripp ng j awspivoted 011 said,

handlesjhavingangularly disposedintegral I arms "and a pair of spreader airnspivoted with sa d handles, of stationary aws car;

. r yr aid pr a er rms. d ripp g tooth on each jaw, gripping jaws pivoted on said stationary jawsand gr pping tooth on each gripping j aw, and pivoted links con necting said gripping jaws and angular s-s. v i

In testimony whereof I affixi ny sign ature.-

THOMAS A. HUTSELL. 

